Are Golf Mk1 mirrors convex on both sides?

My driver's mirror had been broken for ages and the previous owner stuck a smaller mirror on top. I ordered one online, tore out the old one, only to find I ordered a flat glass mirror, so the objects aren't magnified/don't appear bigger.

My passenger side is convex I think, in that objects are bigger than they appear.

Would they be convex on both sides, or are they concave? I don't know much about mirrors other than the flat mirror I ordered definitely isn't right!

My drivers side mirror is flat, it's still the original glass.